B2G 175273 Turbocharger for Caterpillar 325D Excavator C7 7.2L

B2G

The B2G is a BorgWarner turbocharger built for the Caterpillar C7 7.2L diesel engine used in excavators, graders, pavers, and other earthmoving equipment from 2005–2009. BorgWarner part number 175273 (interchange 12709880200) is the master reference for this unit. It fits the CAT 324D, 325D, 325D L, 328D LCR, 329D, 329D L, M325D, and related models, as well as the 120K motor grader and various asphalt pavers. The C7 in excavator duty runs at 140–152 kW (190–205 HP) and this turbo is sized specifically for that operating envelope — different from the truck-application S200AG used on the 3126/C7 7.0L. Our B2G is built new with 100% new components, dynamically balanced, and ships with gaskets. We supply repair shops, rental yards, and distributors.

Turbo Model

B2G (B2G-80H/30BP-ABM/0.70VTF)

OEM / Interchange Numbers

175273, 12709880200, 475273, 475275, 10R-3759, 10R-9217

Application

2005–2009 Caterpillar Excavator 324D, 325D, 325D L, 328D LCR, 329D, M325D; Grader 120K; Paver — C7 7.2L

Service & Support

1-Year Unlimited-Mileage Warranty
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FAQ

The B2G (175273 / 12709880200) fits the Caterpillar C7 7.2L diesel used in excavators (324D, 325D, 328D LCR, 329D, M325D series), the 120K motor grader, asphalt pavers (AP-755, AP-1000D, AP-1055D, BG-2455D), the 545C wheel skidder, and the PM-102 cold planer. Production years are 2005–2009.

No. The S200AG (178482) is a different turbo for the truck-spec C7 7.0L (3126 platform). The B2G is for the excavator-spec C7 7.2L. They have different mounting, different turbine sizing, and are not interchangeable.

CAT part numbers 10R-3759, 10R-9217, 250-7696, and 250-7699 all cross-reference to this turbo. BorgWarner references include 175273, 475273, 475275, and 12709880200.

Common signs on excavators: loss of digging power or slow cycle times, black smoke under load, rising exhaust temperatures, oil leaking from turbo connections or visible in the intake ducting, and unusual noise from the turbo at idle. Check for compressor wheel shaft play — any noticeable radial wobble or axial drag means the bearings are worn.

Brand new — 100% new components, dynamically balanced, inspected before dispatch. Ships with gaskets. No core charge, nothing to return. One-year unlimited-mileage warranty.

Yes. We stock B2G turbos in the US and supply rental yards, heavy equipment shops, and distributors. Single units or volume orders, priced for resale.

B2G Turbo for CAT C7 Excavators: Application, Identification, and Replacement

The B2G turbo (175273) covers a wide range of CAT earthmoving equipment running the C7 7.2L diesel. These machines log serious hours in severe conditions — dust, heat, constant load cycling — so turbo failures are a regular service item. Here is what you need to know.

Which machines use this turbo?

Machine Type	Models
Excavator	324D, 324D FM, 324D L, 324D LN, 325D, 325D FM LL, 325D L, 326D L, 328D LCR, 329D, 329D L, 329D LN
Material Handler	M325D, M325D L MH, M325D LM
Motor Grader	120K
Asphalt Paver	AP-755, AP-1000D, AP-1055D, BG-2455D, BG-260D
Wheel Skidder	545C
Cold Planer	PM-102

The serial number prefixes for the C7 in these machines vary widely (C7C, KHX, JTF, and many others). Always confirm by the BorgWarner number (175273 or 12709880200) or the CAT part number (10R-3759, 10R-9217, 250-7696) stamped on the turbo.

B2G vs S200AG — not the same C7 turbo

Caterpillar used two different C7 engines: the truck-spec 7.0L (3126/C7) with an S200AG turbo, and the excavator-spec 7.2L (C7 Acert) with this B2G turbo. They are not interchangeable — different mounting, different trim, different boost targets. The 7.0L truck turbo has a wastegate; the 7.2L excavator turbo does not. Confirm your engine displacement and application before ordering.

Why excavator turbos fail faster

Excavators and earthmoving equipment create a uniquely harsh operating environment for turbochargers:

Dust ingestion — jobsite dust is the number-one killer. Even a small air filter breach sends abrasive particles straight into the compressor wheel. Inspect the filter housing seals and ducting at every service interval.
Load cycling — excavators go from idle to full load dozens of times per hour. This constant thermal cycling stresses the turbine housing and accelerates bearing fatigue.
Oil contamination — extended service intervals and high soot loads in off-highway applications degrade oil quality. Contaminated oil accelerates journal bearing wear.
Heat soak — shutting down a hot engine without a cooldown period lets residual heat cook the oil in the turbo bearing housing, forming coke deposits that eventually starve the bearings.

Pre-installation checklist

Inspect the entire air intake path from filter to turbo for cracks, loose clamps, or debris. On excavators, check the pre-cleaner and rain cap as well.
Flush the oil supply line and blow it out with compressed air. Replace the line if it shows any signs of internal coking.
Clean or replace the oil drain tube. A restricted drain causes oil to back up into the turbo and push past the seals.
Check crankcase pressure — a worn engine with high blowby will push oil past the turbo seals regardless of the turbo's condition.
Prime the new turbo with clean oil through the inlet port and hand-rotate the shaft before startup.
Idle for 3–5 minutes before putting the machine to work. Let the bearing build a stable oil film.
After shutdown, idle for 2–3 minutes to let the turbo cool down before killing the engine.

Every B2G we ship is balanced and inspected. See our quality process for details.